A) \[60{}^\circ \]
B) \[90{}^\circ \]
C) \[120{}^\circ \]
D) \[175{}^\circ \]
Correct Answer: B
Solution :
Incident ray and finally reflected ray are parallel to each other means \[\delta ={{180}^{o}}\] From \[\delta =360-2\theta \]\[\Rightarrow 180=360-2\theta \]\[\Rightarrow \theta ={{90}^{o}}\]You need to login to perform this action.
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